PROBLEM TO BE SOLVED: To provide a syringe for a liquid medicine with which two or more liquid medicines can be smoothly and safely injected in an examinee one by one.SOLUTION: An inner piston 230 and a rear piston 220 are inserted in a cylinder member 210 in turn wherein a communication channel 232 is normally closed by a closure mechanism 234 and an opening and closing member 233, and is opened by an opening mechanism 214 corresponding to an advanced position of the inner piston 230. When the rear piston 220 is pressed into the cylinder member 210, the liquid medicine in front of the same presses the inner cylinder 230 and the first liquid medicine is pressed out from the cylinder member 210 to the outside. When the inner piston 230 moves to a predetermined position of the cylinder member 210, the opening mechanism 214 opens the opening and closing member 233 so that the second liquid medicine which is pressed by the rear piston 220 is sent by pressure through the communication channel 232 in the inner piston 230 and a through hole 212 of the cylinder member 210 to the outside.COPYRIGHT: (C)2005,JPO&NCIPI【課題】円滑かつ安全に複数の薬液を順番に被験者に注入することができる薬液シリンジを提供する。【解決手段】シリンダ部材２１０に内部ピストン２３０と後部ピストン２２０が順番に挿入されており、内部ピストン２３０は、通常は閉止機構２３４と開閉部材２３３で閉止されている連通流路２３２が前進位置に対応して開放機構２１４により開放される。シリンダ部材２１０に後部ピストン２２０が圧入されると、その前方の薬液に内部ピストン２３０が押圧されて第１の薬液がシリンダ部材２１０から外部に圧送される。内部ピストン２３０がシリンダ部材２１０の所定位置まで移動すると開放機構２１４が開閉部材２３３を開放させるので、後部ピストン２２０に押圧される第２の薬液が内部ピストン２３０の連通流路２３２を介してシリンダ部材２１０の貫通孔２１２から外部に圧送される。【選択図】 図１
